A white blood cell (WBC) in humans can:

Answer: C. Change Its Shape

White blood cells (WBCs), or leukocytes, are a crucial component of the human immune system that lack a fixed, rigid shape, allowing them to constantly alter their structure, similar to an amoeba. This ability, known as amoeboid movement or diapedesis, enables them to squeeze through the narrow walls of blood capillaries to reach tissues affected by infection or injury. By changing their shape to form temporary extensions called pseudopodia, WBCs can engulf, ingest, and destroy harmful bacteria,

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